Testcase for better rotate left and mask support

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30579 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/PowerPC/rlwinm2.ll b/test/CodeGen/PowerPC/rlwinm2.ll
new file mode 100644 (file)
index 0000000..8a789ee
--- /dev/null
+++ b/test/CodeGen/PowerPC/rlwinm2.ll
@@ -0,0 +1,30 @@
+; All of these ands and shifts should be folded into rlw[i]nm instructions
+; RUN: llvm-as < %s | llc -march=ppc32 | not grep and && 
+; RUN: llvm-as < %s | llc -march=ppc32 | not grep srawi && 
+; RUN: llvm-as < %s | llc -march=ppc32 | not grep srwi && 
+; RUN: llvm-as < %s | llc -march=ppc32 | not grep slwi && 
+; RUN: llvm-as < %s | llc -march=ppc32 | grep rlwnm | wc -l | grep 1 &&
+; RUN: llvm-as < %s | llc -march=ppc32 | grep rlwinm | wc -l | grep 1
+
+
+implementation   ; Functions:
+
+uint %test1(uint %X, int %Y) {
+entry:
+       %tmp = cast int %Y to ubyte             ; <ubyte> [#uses=2]
+       %tmp1 = shl uint %X, ubyte %tmp         ; <uint> [#uses=1]
+       %tmp2 = sub ubyte 32, %tmp              ; <ubyte> [#uses=1]
+       %tmp3 = shr uint %X, ubyte %tmp2                ; <uint> [#uses=1]
+       %tmp4 = or uint %tmp1, %tmp3            ; <uint> [#uses=1]
+       %tmp6 = and uint %tmp4, 127             ; <uint> [#uses=1]
+       ret uint %tmp6
+}
+
+uint %test2(uint %X) {
+entry:
+       %tmp1 = shr uint %X, ubyte 27           ; <uint> [#uses=1]
+       %tmp2 = shl uint %X, ubyte 5            ; <uint> [#uses=1]
+       %tmp2.masked = and uint %tmp2, 96               ; <uint> [#uses=1]
+       %tmp5 = or uint %tmp1, %tmp2.masked             ; <uint> [#uses=1]
+       ret uint %tmp5
+}